<html><head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>SetDatabaseNull</title></head>
<body bgcolor="#EFF1F0" link="#3A3966" vlink="#000000" alink="#000000">
<font face="Verdana, sans-serif" size="2"><p align="center"><b><font size="4">SetDatabaseNull()</font></b></p>
<p><b>语法</b></p><blockquote>
<font color="#3A3966"><b>SetDatabaseNull</b></font>(#Database, StatementIndex)</blockquote>

</blockquote>
<b>概要</b><br><blockquote>



Set a bind variable to a NULL value for the next call to <a href="databasequery.html">DatabaseQuery()</a> or <a href="databaseupdate.html">DatabaseUpdate()</a>. 

 

</blockquote><p><b>参数</b></p><blockquote>
<style type="text/css">
table.parameters { border-spacing: 0px; border-style: none; border-collapse: collapse; }
table.parameters td { border-width: 1px; padding: 6px; border-style: solid; border-color: gray; vertical-align: top; font-family:Arial; font-size:10pt; }
</style>
<table width="90%" class="parameters">
<tr><td width="10%"><i>#Database</i></td>
<td width="90%"> 
要使用的数据库。 

</td></tr>
<tr><td><i>StatementIndex</i></td>
<td> 
 
The index of the bind variable within the statement. The first variable has index 0. 

 

</td></tr>
</table>
</blockquote><p><b>返回值</b></p><blockquote>
无.


</blockquote><p><b>备注</b></p><blockquote>



See <a href="databasequery.html">DatabaseQuery()</a> and <a href="databaseupdate.html">DatabaseUpdate()</a> for examples how to specify bind variables in an 
SQL statement. 

 

</blockquote><p><b>参阅</b></p><blockquote>

<a href="setdatabasestring.html">SetDatabaseString()</a>, <a href="setdatabaselong.html">SetDatabaseLong()</a>, <a href="setdatabasequad.html">SetDatabaseQuad()</a>, <a href="setdatabasefloat.html">SetDatabaseFloat()</a>, <a href="setdatabasedouble.html">SetDatabaseDouble()</a> 
<a href="setdatabaseblob.html">SetDatabaseBlob()</a>, <a href="databasequery.html">DatabaseQuery()</a>, <a href="databaseupdate.html">DatabaseUpdate()</a> 

</Blockquote><p><b>已支持操作系统 </b><Blockquote>所有</Blockquote></p><center>&lt;- <a href=setdatabaselong.html>SetDatabaseLong()</a> - <a href="index.html">Database Index</a> - <a href="setdatabasequad.html">SetDatabaseQuad()</a> -&gt;<br><br>

</body></html>